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c++ffmpegrtsprtplibav

Retrieving timestamp in RTP/RTSP

I am using libav/ffmpeg for connecting to IP cameras. I do need to extract the absolute timestamp from the frames, not pts/dts. How can I have this value?

Using Wireshark I can see the following response from the camera (Axis P1355):

RTP-Info: url=rtsp://xxx.dyndns.org:4378/axis-media/media.amp/trackID=1?fps=4&resolution=1280x720&compression=60;seq=32446;rtptime=3287715479\r\n

Solution

  • Finally I solved the problem.

    I had to catch the RTSPState from the context, in order to get the RTSPStream array and get the video one, and after that get the RTPDemuxContext which contains the timestamp.